K11 Owners Group

[drmalacarne]

Here in São Paulo we have now temperatures in the 33-35°C range.
When my KLT is very hot, with the temp gauge needle in the red zone, I'm having a lot of gasoline pouring trhu the fuel tank drain hose.
I try to open the fuel tank cap to relieve the pressure, but the problem is solved for a short period, and soon the gasoline starts to leak again.
What's happening?
Maybe a problem with the fuel tank cap?
Thanks in advance.
Guilherme.
_________________
1994 K1100LT SE n° 0267
1998 HD Heritage Springer 95th anniversary
Yes, a Hog and a Beemer can live together!

[Jim]

Guilherme - I had the same problem a few years ago. First make sure that neither the rain drain or tank vent hose is kinked under the tank.

Have you installed the air accumulator cup? Or do you still have two hoses that lead down to either side of the bike?

There is a TSB (technical service bulletin) for this issue. The problem is that unused gas that is returned from the injectors is spraying out of a little nozzle on the "shed biscuit" - under the right conditions, the gas that sprays out gets picked up by the vent and comes out the drain hose.

The fix is to put a length of gasolene resistant hose on that little nipple on the shed biscuit - use a stainless screw type clamp. I forget the exact length specified in the TSB - maybe about 29 cm. I think it was actually 29.+ cm. The loose end of the hose has to lay down near the pump. This ensures that return fuel is not spraying around the tank, but is being squirted back into the gas in the tank.

If Julius at Gina's hadn't been such a freak about keeping people out of the shop, I'd have pictures for you. Or, if it was summertime, I could go out and take some pix. We have two feet of snow here.
_________________
Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000

"We shall not all die, but we shall all be changed."

[Jim]

Wait a minute - I just noticed you said your temp gauge is in the red. Do you need a new thermostat? I rode through higher temps than that this past summer and my gauge never got up to the red. I do have a three core radiator.
_________________
Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000

"We shall not all die, but we shall all be changed."

[Scott_Anderson]

I had the same fuel leak problem on the '95 during the summertime. If it was hot after a fillup (ok overfill) the fuel would want to leak out.
Once I installed the air accumulator cup for the vacuum break effect, the fuel stopped leaking.
The cup was less than $10us. The other breather vent line I just cut off and plugged.
_________________
Ride safe.



1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold)

[drmalacarne]

[Flying Duck]

What BMW calls the air accumulator (which accumulates gas ) is part 16132307467 and sits below both vents to get rid of excess gas.


Look here:

http://www.realoem.com/bmw/showparts.do?model=0572&mospid=47908&btnr=16_0242&hg=16&fg=05

How much would it cost to get a set of those top case racks built for me?
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

[Jim]

[Off the grid]

Temps like that Gui you should have a fan switch. One of the best mods I did on my bike. The stock radiator fan switch comes on WAY too late.
_________________
Bane of your existence since July 2006
2007 Triumph Tiger ABS. "Sabertooth"
2009 Husqvarna TE610. "The dirty Italian mistress"

[Scott_Anderson]

[SugarHillCTD]

[Mystic Red]

The "air accumulator" sits right below the 2 nipples that have hoses coming off them on the bottom of the tank. Fancy name for a plastic funnel. You simply remove the two hoses and attach the hose that drains at the rear of the bike to the bottom of the funnel. Plug the other one. Done. I can take pictures if you want. Tank's currently off so it would be relatively easy.

[drmalacarne]

I made this today, with the help of my mechanic, Nene:
1- removed the fuel tank cap;
2- identified the return line in the top right of the tank;
3- put a 30cm gasoline resistent hose in the return line exit and attached it to the front base of the fuel tank.
So, now, when running the engine, the returning fuel from the injection system is delivered directly in the lowest part of the tank, inside the gasoline level.
I hope this can resolve the fuel loose problem.
I'll ask my mechanic, Nene, for how much he could make another rear top case brackets reinforcements.
Only Drake and M. Red have interest?
Guilherme.
_________________
1994 K1100LT SE n° 0267
1998 HD Heritage Springer 95th anniversary
Yes, a Hog and a Beemer can live together!

[RAL88]

I would also be interested in the bracket.

Thanks,
_________________
Rich

"If it ain't broke, take it apart and make it work better"
*************
'96' K1100LT-SE
'97' R850GS-R

[Jim]

Guilherme - hope that works for your bike - it did the trick for mine.
_________________
Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000

"We shall not all die, but we shall all be changed."